package com.xuwei.base.thread;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
 * java5的CyclicBarrier同步工具
 * @author David
 * @since 2015年8月20日 下午7:22:36
 * @version 
 * @since JDK 1.6
 */
public class CyclicBarrierDemo {

	public static void main(String[] args) {
		ExecutorService service = Executors.newCachedThreadPool();
		final  CyclicBarrier cb = new CyclicBarrier(3);
		for(int i=0;i<3;i++){
			Runnable runnable = new Runnable(){
					public void run(){
					try {
						Thread.sleep((long)(Math.random()*10000));	
						System.out.println("线程" + Thread.currentThread().getName() + 
								"即将到达集合地点1，当前已有" + cb.getNumberWaiting() + "个已经到达，正在等候");						
						cb.await();
						Thread.sleep((long)(Math.random()*10000));	
						System.out.println("线程" + Thread.currentThread().getName() + 
								"即将到达集合地点2，当前已有" + cb.getNumberWaiting() + "个已经到达，正在等候");						
						cb.await();	
						Thread.sleep((long)(Math.random()*10000));	
						System.out.println("线程" + Thread.currentThread().getName() + 
								"即将到达集合地点3，当前已有" + cb.getNumberWaiting() + "个已经到达，正在等候");						
						cb.await();						
					} catch (Exception e) {
						e.printStackTrace();
					}				
				}
			}; 
			service.execute(runnable);
		}
		service.shutdown();
	}
}